电力系统自动化2025，Vol.49Issue(21)：171-183,13.DOI:10.7500/AEPS20250312004
基于准谐波压降前馈的虚拟同步机并网电流谐波抑制方法
Harmonic Current Suppression Method for Grid-connected Virtual Synchronous Generator Based on Quasi-harmonic Voltage Drop Feedforward
摘要
Abstract
Aiming at the problem of poor grid-connected current quality of virtual synchronous generator(VSG)caused by background harmonics of the power grid,this paper proposes a method for suppressing the harmonics of the grid-connected current based on quasi-harmonic voltage drop feedforward.First,by establishing the sequence impedance model of the VSG,the influence mechanism of background harmonics in the power grid on the grid-connected current of the VSG is analyzed.A harmonic suppression method is proposed that requires neither filter design nor complex controllers,whose suppression effect is minimally affected by power grid frequency fluctuations.Then,the actual voltage drop on the grid-side filter inductor is calculated based on the voltage at the point of common coupling and the power grid voltage.Combined with the ideal fundamental voltage drop,the quasi-harmonic voltage drop is obtained.The quasi-harmonic impedance is reshaped by appropriate feedforward with the feedforward factor.Furthermore,based on the small-signal model,the influence of this method on the system stability is analyzed.The correctness and effectiveness of the proposed control method are verified through experiments.关键词
虚拟同步机/序阻抗建模/准谐波压降/前馈/谐波抑制/小信号模型/稳定性Key words
virtual synchronous generator(VSG)/sequence impedance modeling/quasi-harmonic voltage drop/feedforward/harmonic suppression/small-signal model/stability引用本文复制引用
黄海宏,汪光亚,王海欣..基于准谐波压降前馈的虚拟同步机并网电流谐波抑制方法[J].电力系统自动化,2025,49(21):171-183,13.基金项目
国家自然科学基金区域创新发展联合基金资助项目(U22A20225). This work is supported by Regional Innovation and Development Joint Fund of National Natural Science Foundation of China(No.U22A20225). （U22A20225）
